Test set, telegraph circuit
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1969.0326.001
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- OBJECT TYPE
- Milliammeter
- DATE
- 1901–1915
- ARTIFACT NUMBER
- 1969.0326.001
- MANUFACTURER
- Weston Electric Instrument Co.
- MODEL
- 264
- LOCATION
- Newark, New Jersey, United States of America
More Information
General Information
- Serial #
- 9257
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- Brass case/ glass window/ paper scale/ ebonite.
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 16.0 cm
- Width
- 8.0 cm
- Height
- 11.5 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Communications
- Category
- Telegraphy
- Sub-Category
- N/A
Manufacturer
- AKA
- Weston
- Country
- United States of America
- State/Province
- New Jersey
- City
- Newark
Context
- Country
- North America
- State/Province
- Unknown
- Period
- 1900-1950
- Canada
-
Made for Western Union Tel. Co. - Function
-
Used to adjust and monitor the operating current in a polar telegraph circuit. Measures current in milliamperes. Can be used as a differential ammeter. - Technical
-
Relatively accurate permanent magnet movable coil type DC milli-ammeter. The name "mil-ammeter" is unusual. The more common term is milli-ammeter. Late use of ebonite in binding posts. The material was replaced by Bakelite for that application in the middle of the 1910's. The third binding post is a ground allows the meter to be used as a differential ammeter. - Area Notes
-
Unknown
Details
- Markings
- Mfr. plate: 'WESTON MIL-AMMETER/ PATENTED./ NOV. 6, '88. APR. 29 '90./ FEB. 17. '91. OCT. 4, '98. JULY. 16. '01/ OTHER PATENT PENDING./ WESTON ELEC. INST. CO. NEWARK. N.J., U.S.A./ MODEL 264 NO 9257/ CORRECTOR'
- Missing
- From CA of 01/03/1997 by Kevin Machan: Yes
- Finish
- Meter case, flat black enamel. Meter scale, faded white with black calibration.
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Weston Electric Instrument Co., Test set, telegraph circuit, circa 1901–1915, Artifact no. 1969.0326, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1969.0326.001/
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